The SEM1022 4 to20mA loop isolator is designed for use when power is available at both sides of the isolation barrier and has two independent channels in the same housing.

This isolator requires no user-adjustment during commissioning, apart from an initial test to ensure it operates correctly over its full working range. 

Minor adjustments can be made to the calibration of the device by means of the front-panel accessible calibration potentiometers.

Incorrect connection in the loop will not damage the device as long as the specified maximum currents/voltages are not exceeded.